Screening-machine.



G. 1.-& P. 13.3mm. SCREENING MAOHINB.

APPLICATION FILED APR. 2, 1908.

901,519, Patented 001;. 20, 1908.

seer AVAILABLE new ermine rsriin'r errrre.

REORGE ii". BURKE AND PETER D. BURKE, OF ROSWELL, SOUTH DAKOTA.

"methionine Specification of Letter:

Toull whom it may concern."

Be it known that we, Greener. P. BURKE and PETER. D. BURKE, citizens ofthe United States, residing at Roswell, in. the county of Miner, Stateof South Dakota, have invented a new and useful Facreening Machine, ofwhich the following is a specification.

This invention relates to a machine designed primarily for screeningsend, hut it is applicable for separating the fine particles from thecosrse oi other materials.

One object of the invention is to provide a simple, strong andconvenient machine for the purpose stated, the ports of which. can bequickly separated or knocked-down and, the supporting frame folded flatto enable the f to es being readily transported from place to place withgreat case, a. saving of time and cconom" of space.

Another ohjcct of the screening cylinder, the foreminous covering ofwhich may he quickly removed and, if worn out, replaced by anew one, orby one of larger or smaller mesh if so desired with very little loss oftime.

A further object of the invention resides in the use of a force feedattachment applied to the cylinder shalt within the hopper and at themouth of the cylinder to assure the proper feeding of material thereto.

l/Vith these and other objects in 'VlGW the invention consists of thenovel construction; combination and arrangement of arts hercinafterdescribed and claimed, re erence being had to the accompanying drawing,in. which Figure his a view in side elevation partly in section of theimproved. screening ma chine; Fig. 2 it view in elevation of the tailend of the machine; Fig. 3 a longitudinal section. of the rovolublescreen; Fig. 4 a perspective View of a detail of construction.

Similar reference numerals ere used for the some parts in all thefigures.

.ltcforring to the drawing, the numeral! indicates the folding framesupporting the screening mechanism which, in this instance, comprisesthe vertical legs 2 iti. the head of the machine, the similarly disposedlegs 3 at tho tail/end. thereof and cross braves i oxtcndin diagonallybetween the legs 2 and J) on (will side of the machine. :uo connected loone another by bolts 5') and h, the latter bolls, joining, the upperends of the cross Imus-s "l to tho upper curls of the legs 3 and 2': andmo removed when the mo.-

the invention relates to.

These parts chine is to he disassembled, the bolts 5 serving as pivotalpoints on which the elements of the frame are folded.

The legs 2 and 3 converge slightly towards the top, as represented inFig. 2, thelegs 3 being" preferably formed of a single piece of materialbent to form an arched top 7 on which one of the bearings 8 for thelongitw dinol screen shaft 9 is bolted. A cross piece extends betweenthe legs 2 near their upper end to serve as a brace andss a su ort forthe upper hem-lug 8 of shaft 9 whic caring is preferably cast integralwith said brace. The hearing 8 on the arch 7 is lower than the one atthe other end so that the shaft'will in.

cline downwardly towards the tail of the machine.

Mounted on the shaft 9 to revolve therewith is the screening cylinder 10in communication st its head end. with the feeding mechanism 1.1 end atits tail end with a spout 12 to carry off the material too lar e to passthrough the screening material. he screen 10 is constructed with a headand tail ring 13 and 14, respectively, each connected by curved. spokes1.3 to o. hub 16 fast on the shaft 9. The concave sides of the spokesface the head of the cylinder to facilitate the entrance of material atone end and the exit of refuse at the op positc end. Surrounding thering gs l3 and. 14 and extending between them the foraminous screen 17which may hc woven wir i, perforated motel or other material sultablefor the purpose, but here shown as woven Wire. The screening material 17is securely hold in position by a removable frame 18 clampedv on therings 13 and 14 over said material.

The frame fit is formed of two or more circular hands ll) connectedtogether by a number of narrow parallel slats 20 screwed, rivcted orbolted to the bonds and. equally spaced. The hands arc made preferablyofspring metal and may be in two parts with projecting lugs 21 oppositelydisposed on each part and perforated to receive clzunpmg bolts 22, as inFig. 3, or of a single piece with fastening lugs on one side only, socFig.2. After the screening material has been upplied to the rings 13 andi4 and tightly stretched thereon the frame 18, if the bands are in onepiece is sprung open and slipped cndwiso over the scrconil'ig cylinder10 until the cod bands ill surround the rings '13 and 14, the bolts 32are thou applied and the bonds clamped iirmly around said rings llll')tightly fasteningthe screenii'ig material in 3 place. If the two partframe 18 be used the I parts of the-frame are fitted over the cylin--.drical screen 10 from opposite sides and clamped. Should the distancebetween the 1 rings Band 14 be too great for the screening material toretain its shape when the machine is' in operation, one orniore bands 19may be placed between-the .end bands, and an e ual number of supportingrings 23 place Within the screen 10 for the bands to press against.

The legs 2 project above 8 and are bolted to a hopper 24 into which thematerial to be screened is thrown. Pro; Lecting rearwardly from thebottom of the opper isa tubular outlet 25 extending a. short distanceinto the screen 10 and consen trio with the shaft 9 which passestherethrough and through the lower end of the hopper. The head of thescreen is closed by a board or plate 26 except for a central opening toadmit the tubular hopper outlet 25. By means of the closure 26 thematerial 'to be screened is prevented from working out of the head endof the screen.

The quantity of sand or other material admitted to the screen 10 isregulated by a slid ing gate 27 movable in guides on the rear Wall ofthe hopper 24 above the entrance to the tubular outlet 25. liaising andlowering the gate changes the size of the outlet and hence the quantityof material passing to the screen.

Removably secured on the shaft 9 "within the hopper is a force feedattachment 27 comthe shaft bearing hopper at'rachal can now be folde onthe pivot bolts 5 into a much smaller and more convenient compass byturning the upper ends of the front and rear pair of legs in wardlytowards each other as will be understood. The machine is thus reduced tothree conveniently handled pieces, the frame, the shaft and its smallwagon or cart and conveyed with case from one locality to another, or ifshipped in this condition. less space is occupied and the machine ishandled with greater and more quickly than if it were up.

It is to be noted that the rings which support the screening materialand the hands by which said screen is held on the rings may be circular,elliptical, pentagonal or of other shape best suited to the purposedesired; and

that where rings'and bands are used in the specification and claims suchWords are to be taken in the broadest sense.

Having described our invention what we claim as new and desire to secureby Letters Patent is 1. The combination in screening in achine of ashaft, a cylindrical screen mounted thereon, and a flexibly jointed mainframe provided with bearings for said shaft, said frame beinglongitudinally extensible to permit the removal therefrom of thecylinder and shaft.

2. The combination in a screening machine of a shaft, a cylindricalscreen mounted thereon, a longitudinally extensible knockdown framehaving bearings for said shaft, the extension of the frame permittingthe re- )rising a hub with rearwardly projecting lingers 29 thereon.These fingers are preferably set at an angle to the axis of the shaft'to force the contents of the ho me! into the screen. The force feedattachment. when not necessary may be removed from the shaft.

The outlet s )out 12 at the tail. bf the screen 10 is removablysupported on the frame 1 i-nr any convenient manner as by hooks 30engaging notches or eyes on one of the cross braces 4 and legs 3. Themachine may be operated by a hand crank 31 on the shaft 0, or by powerthrough the pulley 32 on the same shaft.

When the scrceninp machine is to be transported, certain parts thereofare for convenience separated from one another or knocked-down in thefollowing manner. The outlet spout 12 is removed and the bolts moval ofthe shaft and cylinder and detachable means normally holding said framein shaft-holding position.

3. The combination in a screening machine of a longitudinally extensibleframe formed ofa plurality of pivotally connected sections, detachablemeans for locking the parts "of the frame rigidly together, bearings onsaid-frame, a shaft mounted in said bourings, a revolublc screen on saidshaft and a feed hopper connected to the frame and having an opening forthe passage of the shaft.

, 4. The combination in a screening machine of a shaft, a revolublescreen mounted there on, a flexibly jointed main. frame provided withbearings for said shaft, a hopper supported by the frame and openinginto said screen, said hopper having an opening for the passage of theshaft, and crossbraces pivot- 6 disconnected from the upper ends of thecross braces 4 so that theinain frame 1 may be extended longitudinallyuntil the bearin,g 8 on the legs 3 is free of the shaft 9. The crank 31and the pulley 32 having been removed from the shaft 9 the latter, withthe scrcdh 10 and force feed attachment therein is withdrawn from thebearing 8 at the head ally connected. at their lower ends to saidv mainframe and detachably connected at their upper ends to said frame,whereby on loosening the detachable connections said main frame may beelongated to permit of .the removal of shaftand sc 5. The combination inas ling machine of a shaft, :1 rcvoluble screen mounted thereof themachine. The main frame 1 with the on, a flexibly jointed main framecomprising attachments and the tail. spout. These parts can be loaded ona a pair of legs at one end provided with a and screen and then foldedin an approxibearing for saidshaft anda hopper fixed to mately fiatform.

said legs, a pairof legs at theppposite end of In testimony that weclaim the foregoing said frame supportin a second s cross-braces pivotalconnected together matures in the presence of two'witnesses.

and to the lower en sof said legs and 'detachably connected for securingthe upper I ends of said cross-braces to the 11 per ends of i I said les whereby on the removal of said de- Witnesses tachab e connections themain framema be a N. E. BRATRUD, elongated to permit the rernoval of theaft C. A. BAKER.

aft bearing, as our own,we have hereto affixedour sig- 15

